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Mammalia (Class) - mammals ..[Acrotheria] (Subclass) ..[†Ameghinichnus] (Genus) ..[†Apotheria] (Subclass) ..[Australosphenida] (Superdivision) ..[†Brasilichnium] (Genus) ..[Cloacalia] ([unranked]) ..[Eutheria] (Subclass) ..[Holotheria] (Subclass) ..[Mammaliaformes] (Subclass) ..[Marsupialia] ([unranked]) ..[Metatheria] (Subclass) ..[Mutica] ..[Pholidotus] (Genus) ..[Pinnata] ..[Placentalia] ([unranked]) ..[Quadrupedia] ..[Theriiformes] (Subclass) ..Theriimorpha (Clade) ..[Theriimorpha] (Superdivision) ..[Trechnotheria] (Subclass) ..[†Tshelkariidae] (Family) ..[Unguiculata] ..[Ungulata] ..[†Volaticotheria] (Order) ..Prototheria (Subclass) - monotremes ....[Ornithodelphia] (Infraclass) ....[Platypoda] (Order) - platypuses ....[Tachyglossa] (Order) ....Yinotheria (Clade)

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Last updated: 21 Sep 2025